These articles are about Interfacing in SAP. Interfacing between systems, or interfacing between standard SAP components and custom build components. A system without interfacing is a bit unreal: no information is fed into is and it feeds no information to other systems. Would it be missed ? Check out the Idoc articles on exchanging Idoc (Intermediate documents) between SAP and non-SAP systems In- and outbound. Check out the BAPI articles on access to documents bypassing a graphical user interface. And get to grips with the transport mechanism, which effectively interfaces development objects though the system landscape.
